Audio T Verdict
The QUAD 3 is a thoroughly modern integrated amplifier hiding behind one of the most characterful front panels in contemporary Hi-Fi. Its styling looks back to classic QUAD electronics, but behind that retro-inspired fascia is a versatile amplifier capable of handling turntables, CD players, streamers, computers, televisions, Bluetooth sources and headphones.
We particularly like that the technology hasn't overwhelmed the way the amplifier is used. Volume, source, balance, bass and QUAD's distinctive Tilt control remain immediately accessible from the front panel, while the orange display gives you the information you need without turning the amplifier into another large-screen device.
More importantly, the engineering underneath is serious. With 65W per channel into 8 ohms, 100W into 4 ohms, up to 10A of output current and a substantial toroidal power supply, this is far more than a lifestyle amplifier in a pretty box. Add the excellent connectivity and the ability to operate as a preamplifier later, and the QUAD 3 has the makings of a system centrepiece you can keep for a long time.
QUAD 3 Integrated Amplifier
The QUAD 3 is a compact Class AB integrated amplifier that brings together QUAD's traditional approach to analogue amplification with the connections expected from a modern Hi-Fi system.
Its 65W-per-channel amplifier is joined by an ESS9038Q2M 32-bit DAC, high-resolution USB audio, optical and coaxial digital inputs, HDMI ARC, Bluetooth 5.1 with aptX HD, a dedicated moving magnet phono stage, two analogue line inputs, a current-feedback headphone amplifier and a variable preamplifier output.
- 65W per channel into 8 ohms
- 100W per channel into 4 ohms
- Class AB power amplification
- Maximum output current of 10A
- 235VA toroidal transformer
- 30,000µF power-supply reservoir
- ESS9038Q2M 32-bit DAC
- USB PCM playback up to 768kHz
- DSD64, DSD128, DSD256 and DSD512 support via USB
- Optical and coaxial S/PDIF up to 192kHz
- HDMI ARC with CEC functionality
- Bluetooth 5.1 with aptX and aptX HD
- Dedicated low-noise MM phono stage
- Two RCA line-level inputs
- Variable RCA preamplifier output
- Dedicated current-feedback headphone amplifier
- 6.3mm headphone output
- QUAD Bass and Tilt controls
- Balance adjustment
- Five selectable DAC filters
- 12V trigger input and output
- Full-function remote control
Classic QUAD Design, Reworked for Today
The visual language of the QUAD 3 deliberately looks backwards while the electronics look firmly forwards.
Its front panel takes inspiration from the classic QUAD 22 preamplifier, while the silver finish, orange illumination and compact proportions also connect it visually with the modern QUAD 33 and 303.
A slim orange-lit display communicates source selection, settings and menu information, while the physical rotary controls retain the hands-on character associated with classic QUAD equipment.
Five Proper Front-Panel Controls
The front panel provides dedicated rotary controls for:
- Volume: also operates mute and menu navigation
- Source: selects the connected input
- Bass: adjusts low-frequency balance
- Tilt: changes the overall tonal balance
- Balance: adjusts the left/right relationship
That gives the QUAD 3 a refreshingly physical interface. Everyday functions can be adjusted without needing an app or repeatedly navigating an on-screen menu.
65W Into 8 Ohms, 100W Into 4 Ohms
The Class AB power-amplifier section is rated at 65W per channel into 8 ohms and 100W per channel into 4 ohms, both measured at less than 1% THD.
The ability to increase output substantially into a 4-ohm load is useful when partnering the QUAD 3 with modern loudspeakers whose impedance varies significantly with frequency.
Maximum output current is specified at 10A.
Is 65 Watts Enough?
Amplifier power should always be considered alongside loudspeaker sensitivity, impedance, listening distance and desired volume rather than as a number in isolation. The QUAD 3's ability to deliver 100W into 4 ohms and up to 10A is particularly relevant when judging how it will cope with real loudspeaker loads. Audio T can help match it to your speakers before you buy.
235VA Toroidal Power Supply
QUAD uses a substantial 235VA toroidal transformer to feed the Class AB amplifier.
The supply is backed by a 30,000µF reservoir, providing stored energy for musical peaks and supporting the amplifier's ability to deliver current into more demanding loads.
This is one of the reasons the QUAD 3 weighs a substantial 8kg despite measuring only 300mm wide.
Low Distortion Power Amplifier
QUAD specifies power-amplifier THD at less than 0.003% at 1kHz, 30W into 8 ohms.
Power-amplifier frequency response is quoted at 20Hz to 20kHz within ±0.3dB, while signal-to-noise ratio exceeds 110dB A-weighted.
ESS9038Q2M 32-Bit DAC
Digital conversion is handled by the ESS ES9038Q2M 32-bit DAC.
QUAD couples this DAC with a Class A post-DAC filter circuit, providing the digital section with its own carefully engineered analogue output stage rather than treating the converter as an afterthought.
The DAC section itself is specified with less than 0.001% THD at 1kHz and a signal-to-noise ratio greater than 116dB A-weighted.
USB Audio up to PCM 768kHz and DSD512
The rear USB-B input allows a compatible computer to feed the QUAD 3 DAC directly.
PCM sample rates from 44.1kHz through to 768kHz are supported, alongside:
- DSD64
- DSD128
- DSD256
- DSD512
QUAD provides dedicated Windows USB audio drivers through its support website.
Two Different USB Ports
The rear USB-B connection is the audio input for a computer. The separate USB-A socket marked for updates is for firmware installation only and cannot be used to play music from a computer, USB stick or external drive.
Optical and Coaxial Digital Inputs
For CD transports, network streamers and other digital sources, the QUAD 3 provides both coaxial RCA and optical TOSLINK S/PDIF inputs.
Both support PCM sample rates from 44.1kHz up to 192kHz.
This makes the QUAD 3 particularly well suited to the matching QUAD 3CDT CD Transport, with the amplifier performing the digital-to-analogue conversion.
Digital Upsampling
QUAD states that audio received through the S/PDIF and USB inputs can be upsampled internally to either 352.8kHz or 384kHz, depending on the source material.
This processing takes place within the amplifier's digital architecture before conversion by the ESS DAC.
Five Selectable Digital Filters
The QUAD 3 provides five DAC reconstruction filters, allowing subtle adjustment of the way digital signals are processed.
- Linear Fast
- Linear Slow - factory default
- Minimum Fast
- Minimum Slow
- Hybrid
The differences are deliberately subtle. They alter aspects such as roll-off behaviour, pre-ringing and transient response rather than acting as conventional tone controls.
Which Digital Filter Should I Use?
There is no universally correct choice. QUAD sets Linear Slow as the default, so that is the sensible place to start. Once the system is familiar, the other filters can be compared with music you know well.
DPLL Adjustment
The setup menu also provides Normal and Wide DPLL bandwidth settings for incoming S/PDIF signals.
Normal is the recommended default. Wide is intended for digital sources with unusually high jitter where the DAC has difficulty maintaining a stable lock.
If your digital source works correctly in Normal mode, QUAD recommends leaving it there.
HDMI ARC for Your Television
The QUAD 3 can become the audio hub for a television system as well as a conventional Hi-Fi.
Connect a compatible television to the HDMI ARC input and TV audio can be reproduced through your stereo loudspeakers.
For ARC to work correctly:
- The television must support HDMI ARC
- The television must support HDMI-CEC
- ARC must be enabled in the television settings
- The TV audio output must be set to PCM Stereo or PCM 2-channel
- QUAD recommends an HDMI 1.4 cable or later
TV Remote Volume Control
The HDMI implementation allows a compatible TV remote to control QUAD 3 volume.
Interestingly, QUAD's manual confirms that this volume control can still operate while the amplifier's CEC power-sync setting is switched off.
If you want the QUAD 3 to switch on and off together with the television, turn CEC on in the amplifier's menu.
CEC Is Off by Default
QUAD ships the CEC power-sync setting switched off. This helps avoid unwanted switching behaviour between HDMI devices. Turn it on only if you want the amplifier's power state synchronised with your television.
Bluetooth 5.1 with aptX HD
Bluetooth 5.1 provides a quick way to play music from compatible phones, tablets and computers.
The QUAD 3 supports both aptX and aptX HD codecs where the transmitting device also supports them.
Bluetooth is particularly useful for casual playback and guests, while wired USB, S/PDIF or an external network streamer remain available when you want a dedicated source connection.
Dedicated Moving Magnet Phono Stage
Turntables have not been treated as an afterthought. The QUAD 3 includes a dedicated low-noise Moving Magnet phono stage with its own rear grounding terminal.
The phono input is specified at:
- Gain: +47dB
- Input sensitivity: 3.6mVrms
- Input impedance: 47kOhm / 100pF
- Signal-to-noise ratio: greater than 78dB A-weighted
Moving Magnet Only
The built-in phono input is designed for Moving Magnet cartridges. A low-output Moving Coil cartridge will require a suitable external MC phono stage or step-up arrangement connected to one of the line inputs.
100pF Phono Input Capacitance
The built-in MM stage presents 47kOhm resistance and 100pF input capacitance.
That capacitance figure is useful when matching a moving magnet cartridge because total cartridge loading also includes the capacitance of the tonearm wiring and phono cable.
Adjustable Analogue Input Sensitivity
The menu allows the sensitivity of AUX1, AUX2 and PHONO to be adjusted in 1dB increments over a ±6dB range.
This is particularly useful when different analogue sources have noticeably different output levels, allowing them to be brought closer together so switching sources does not produce a dramatic jump or drop in volume.
Two Analogue Line Inputs
Two unbalanced RCA line inputs, AUX1 and AUX2, are provided for conventional analogue sources.
These could accommodate equipment such as:
- A CD player with analogue outputs
- A network streamer
- An external DAC
- An external phono stage
- A tuner
- A cassette deck or other line-level source
Use the QUAD 3 as a Preamplifier
A variable stereo RCA pre-amplifier output allows the QUAD 3 to drive an external power amplifier, active subwoofer or compatible signal processor.
The pre-out is specified at a maximum of 2.3V with a 120-ohm output impedance.
This gives the amplifier genuine long-term flexibility. You can begin by using the internal 65W power amplifier and add separate power amplification later without abandoning the DAC, phono stage, controls or source connectivity.
Add a Separate Power Amplifier Later
The QUAD 303 Power Amplifier is one obvious partner if you want to develop the system further, although the pre-out can be used with other suitable power amplifiers too.
Dedicated Current-Feedback Headphone Amplifier
The front-panel 6.3mm headphone socket is driven by its own current-feedback headphone amplifier, rather than simply taking a heavily attenuated feed from the speaker outputs.
QUAD specifies:
- Supported headphone impedance: 20 to 600 ohms
- Output impedance: 2.35 ohms
- THD: less than 0.01% at 1kHz / 50mW
Plugging headphones into the front socket automatically mutes the loudspeaker outputs.
The Famous QUAD Tilt Control
The Tilt control is quite different from simply having separate bass and treble knobs.
It changes the two ends of the frequency spectrum together around an approximately 700Hz axis. Moving the control one way lifts the bass while reducing the treble; moving it the other way reduces the bass while lifting the treble.
QUAD implements the adjustment in 1dB steps.
The idea is to change the overall tonal balance without introducing an obvious isolated boost in one narrow area of the spectrum.
Why Would You Use Tilt?
Not every recording is balanced the same way, and not every room is acoustically neutral.
A recording that sounds overly bright can be tilted slightly warmer. A system or recording that sounds too heavy can be tilted in the opposite direction.
It is a very QUAD way of acknowledging that real-world record collections and real-world rooms rarely behave like laboratory conditions.
Separate Bass Control
In addition to Tilt, a dedicated Bass control provides up to ±3dB of low-frequency adjustment.
This can help compensate for loudspeaker positioning, room reinforcement or recordings with either too much or too little low-frequency weight.
Bypass the Tone Controls
The complete tone-control section can be switched on or off through the menu, front-panel interface or remote control.
If you prefer to listen without Bass or Tilt adjustment, the controls can therefore be bypassed rather than simply left at their centre positions.
Balance Control
A dedicated Balance control allows the stereo image to be shifted left or right when required.
This can be useful for asymmetrical listening positions, room layouts or older recordings where the stereo balance needs a little correction.
Customisable Orange Display
The orange-lit display continues the visual language of classic QUAD equipment while providing modern source and menu information.
Display options include:
- Backlight Off
- Backlight brightness Levels 1 to 3
- Display contrast Levels 1 to 5
- Display text On or Off
The display can therefore be made prominent during setup or considerably more discreet during listening.
Full-Function Remote Control
The supplied remote provides control over everyday functions including standby, volume, mute, source selection, balance, Bass, Tilt, tone bypass, backlight and menu navigation.
The handset is also designed to operate the matching QUAD 3CDT, allowing a QUAD 3 and 3CDT system to share a single remote.
12V Trigger Input and Output
The QUAD 3 includes both a 12V trigger input and 12V trigger output.
The trigger output can switch compatible equipment such as the QUAD 3CDT or another suitable component, while the trigger input allows the amplifier itself to be controlled by compatible external equipment.
The trigger connections use 3.5mm jack cables.
Auto Standby
Auto standby is set to 20 minutes by default.
The menu provides three options:
- 20 minutes
- 60 minutes
- Never
Standby power consumption is specified at less than 0.5W.
Thermal and Short-Circuit Protection
The QUAD 3 incorporates protection against conditions including gross overload and short-circuited loudspeaker outputs.
Good ventilation is still essential, particularly because this is a conventional Class AB amplifier capable of generating heat during normal use.
Give It Room to Breathe
Do not install the QUAD 3 in a sealed cabinet or cover its ventilation openings. QUAD specifically requires the amplifier to be used on a solid, level surface with adequate ventilation around it.
A Natural Partner for the QUAD 3CDT
The QUAD 3CDT has been designed as the visual and functional CD companion to the QUAD 3.
The 3CDT performs disc reading and digital transport duties, while the QUAD 3's ESS DAC handles conversion.
The two units also share the same compact proportions and can be controlled from a common handset.
A Genuine System Hub
The amount of connectivity makes the QUAD 3 suitable for systems that mix old and new sources.
Vinyl System
- Dedicated MM phono stage
- 47kOhm / 100pF input
- +47dB phono gain
- Ground terminal provided
Digital Hi-Fi
- ESS9038Q2M DAC
- USB up to PCM 768kHz
- DSD512 support
- Optical and coaxial to 192kHz
TV System
- HDMI ARC
- CEC support
- TV remote volume control
- Stereo PCM audio
Future Expansion
- Variable pre-amplifier output
- 12V trigger input
- 12V trigger output
- External power amp or subwoofer support
QUAD 3 Key Features
- Class AB integrated amplifier
- 65W per channel into 8 ohms
- 100W per channel into 4 ohms
- 10A maximum output current
- 235VA toroidal transformer
- 30,000µF reservoir capacity
- ESS9038Q2M 32-bit DAC
- Class A post-DAC filter circuit
- PCM up to 768kHz via USB
- DSD512 support
- Optical input to 192kHz
- Coaxial input to 192kHz
- Five selectable DAC filters
- DPLL Normal and Wide settings
- HDMI ARC
- HDMI-CEC support
- Bluetooth 5.1
- aptX support
- aptX HD support
- Dedicated MM phono input
- 47kOhm / 100pF phono loading
- Two RCA analogue inputs
- Adjustable analogue source sensitivity
- Stereo RCA pre-out
- Dedicated current-feedback headphone amp
- 20 to 600-ohm headphone compatibility
- Bass control
- QUAD Tilt control
- Balance adjustment
- Tone-control bypass
- Customisable orange display
- 12V trigger input and output
- USB firmware update facility
- Full remote control
- QUAD 3CDT remote compatibility
- 8kg net weight
- 300mm compact chassis width
Frequently Asked Questions
Is the QUAD 3 still a current model?
Yes. QUAD continues to list the QUAD 3 within its current Integrated Amplifiers range.
How powerful is the QUAD 3?
It is rated at 65W per channel into 8 ohms and 100W per channel into 4 ohms, with maximum output current of 10A.
Is the QUAD 3 Class A, Class AB or Class D?
The main loudspeaker amplifier is Class AB. QUAD also uses a Class A post-DAC filter circuit in the digital section.
What DAC does the QUAD 3 use?
An ESS ES9038Q2M 32-bit DAC.
What is the maximum USB resolution?
USB supports PCM up to 768kHz and DSD up to DSD512.
What does optical support?
The optical S/PDIF input supports PCM from 44.1kHz up to 192kHz.
What does the coaxial input support?
The coaxial S/PDIF input supports PCM from 44.1kHz up to 192kHz.
Does the QUAD 3 have selectable digital filters?
Yes. Five are provided: Linear Fast, Linear Slow, Minimum Fast, Minimum Slow and Hybrid. Linear Slow is the factory default.
Does the QUAD 3 support MQA?
MQA decoding is not listed in QUAD's current product specification or current user manual, so Audio T does not advertise MQA support for the QUAD 3.
Does the QUAD 3 have Bluetooth?
Yes. Bluetooth 5.1 is fitted with support for aptX and aptX HD where supported by the transmitting device.
Does the QUAD 3 have HDMI?
Yes. It has an HDMI ARC input for receiving stereo PCM audio from a compatible television.
Does it support HDMI eARC?
QUAD specifies HDMI ARC, not eARC.
Can my TV remote control the QUAD 3?
Yes, with compatible HDMI-CEC equipment. QUAD's manual states that TV remote volume control remains available even when the amplifier's CEC power-sync setting is off.
Can the QUAD 3 switch on with my TV?
Yes. Enable CEC in the QUAD 3 menu if you want power on and off to synchronise with a compatible television. CEC is off by default.
What audio format should my TV output?
Set the television's HDMI ARC output to PCM Stereo or PCM 2-channel.
Does it have a phono stage?
Yes. It has a dedicated low-noise Moving Magnet phono stage.
Can I connect a Moving Coil cartridge directly?
No. The built-in phono stage is for Moving Magnet cartridges. A suitable external MC phono stage is required for a low-output Moving Coil cartridge.
What is the MM phono loading?
47kOhm resistance and 100pF input capacitance.
How much phono gain does it provide?
QUAD specifies +47dB maximum gain for the MM phono input.
How many analogue line inputs are there?
Two stereo RCA line inputs, labelled AUX1 and AUX2.
Can the input levels be adjusted?
Yes. AUX1, AUX2 and PHONO sensitivity can be adjusted over a ±6dB range in 1dB steps.
Does it have a pre-out?
Yes. A variable stereo RCA pre-amplifier output can feed an external power amplifier, suitable active subwoofer or compatible signal processor.
Can I use a QUAD 303 power amplifier with it?
Yes. The QUAD 3's pre-amplifier output allows it to be used as a source controller and preamplifier feeding a suitable external power amplifier such as the current QUAD 303.
Does it have a headphone amplifier?
Yes. A dedicated current-feedback headphone amplifier feeds the front 6.3mm socket.
Which headphone impedances are supported?
QUAD specifies a load range of 20 to 600 ohms.
Do the speakers mute when headphones are connected?
Yes. Inserting headphones automatically deactivates the loudspeaker output.
Does it have a conventional treble control?
No. The QUAD 3 provides separate Bass and Tilt controls. Tilt adjusts bass and treble together around a 700Hz axis rather than acting as an independent treble control.
What does the Tilt control do?
It changes the overall tonal balance by lifting bass while reducing treble, or reducing bass while lifting treble, in 1dB steps around a 700Hz axis.
How much bass adjustment is available?
QUAD specifies ±3dB of bass adjustment.
Can I bypass the tone controls?
Yes. The tone-control section can be switched off through the menu or remote control.
Can the display be dimmed?
Yes. Backlight brightness has three levels plus Off, while display contrast can be adjusted from Level 1 to Level 5.
Does it have 12V triggers?
Yes. One trigger input and one trigger output are fitted.
Can the USB-A socket play music from a USB drive?
No. The USB-A socket is exclusively for firmware updates. Computer audio connects to the separate USB-B input.
Does the QUAD 3 have auto standby?
Yes. It defaults to 20 minutes and can be changed to 60 minutes or Never.
How big is the QUAD 3?
It measures 300mm wide, 101mm high and 332mm deep.
How much does it weigh?
8kg net.
Is there a matching CD player?
The matching QUAD 3CDT is a dedicated CD transport designed to partner the QUAD 3 and use its internal DAC.
What warranty does QUAD offer?
QUAD currently offers an extended three-year warranty on eligible products when registered within 90 calendar days of purchase, subject to its current warranty terms and exclusions.
Related QUAD Products and Audio T Guides
Why Buy the QUAD 3 From Audio T?
An amplifier as versatile as the QUAD 3 is best judged as part of a complete system. Speaker sensitivity and impedance, room size, cartridge type, digital sources and even television connectivity can all affect which features matter most to you.
Audio T can help configure the QUAD 3 around the equipment you already own, demonstrate suitable loudspeaker combinations and make sure features such as MM cartridge loading, HDMI ARC, digital inputs and external power amplification are set up correctly.
- In-store demonstrations
- Loudspeaker matching
- Turntable and MM cartridge advice
- Phono-stage setup
- Streamer and digital-source matching
- USB audio guidance
- HDMI ARC setup advice
- DAC filter guidance
- QUAD 3CDT system demonstrations
- External power-amplifier advice
- QUAD 303 upgrade guidance
- Headphone matching
- System installation advice
- Warranty registration guidance
- Ongoing after-sales support
Contact your local Audio T store to arrange a demonstration or discuss whether the QUAD 3 is the right amplifier for your speakers, turntable and digital sources.