Onkyo HT-S3705 5.1 Home Theatre System

Onkyo HT-S3705 5.1 Home Theatre System

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Onkyo build and develop some of the most highly regarded AV receivers on the market today, being one of the few brands who focus on sound quality and functionality without compromising on either aspect. The company's range of home-cinema hubs are built into a variety of price points, meaning there's a unit for everyone, and each of these units in each of these price categories tend to win awards and hearts alike.

Onkyo's HT-S3705 5.1 home theatre system features a plethora of prolific and convenient features in order to provide a truly immersive and enhanced audio experience, regardless of whether you are listening to your favourite music or placing yourself within your favourite films. 

The receiver's high-current amplification has more than enough guts to fill a room with rich, clean sound. While powerful, the unit is in no way a 'brute' and tempers intense bass and punchy dynamics with delicate subtlety flawlessly, thanks to the 192kHz/24-bit DAC TI Burr-Brown DAC integrated within. This exceptional DAC chipset means that decoding high quality formats like Dolby True HD and DTS-HD Master Audio from Blu-Ray discs is done to exemplary level, without compromise.

Inputs include six 4k/60 Hz HDMIs, ideal for media players and games consoles. A HDMI output with ARC functionality is also included, meaning you are able to add surround sound to broadcast TV. Streaming your favourite songs to the system is done via DSP-optimised Bluetooth, directly from your smartphone, tablet or laptop. 

The included full-range satellite loudspeakers and subwoofer are simple to set-up, meaning this home cinema system is as practical and convenient as it is adept in delivering an exceptional audio performance. 

Onkyo HT-S3705 package has serious hi-fi credentials with convenience and features that rivals competitor models in higher price categories.



Amplifier  High-Current Amplification
with Discrete Output Stage Circuitry
Amplifier power (watts)  100 W/Ch (6 ?, 1 kHz, 1% THD, 1 Channel Driven, IEC)
DAC/Digital bits  TI Burr-Brown 192 kHz/24-Bit DACs for All Channels 
Digital audio  4 Composite Video Inputs (1 Front/3 Rear) and 1 Output 
3 Digital Audio Inputs (1 Optical and 2 Coaxial) 
7 Analog Audio Inputs (1 Front/6 Rear)
8cm cone
Max input 120watt

Down firing 16cm cone
Max input 130watt
                        DSP, eq. modes & audio options                             4 DSP Modes for Gaming: Rock, Sports, Action, and RPG
Theater-Dimensional Virtual Surround Function
Finish  Black 
Frequency response (Hz) 5Hz - 100Hz/+1 dB, -3 dB (DSP Bypass) 
 Key decoding HDMI® Support for 4K/60 Hz Video,
Audio Return Channel,
Dolby® TrueHD,
DTS-HD Master Audio™,
Super Audio CD,
Multichannel PCM,
On-screen display Overlaid On-Screen Display (OSD) via HDMI
Power handling (watts) SATELLITES & CENTRE: 120 (max input power)
SUBWOOFER: 130 (max input power)
Supplied accessories Remote Control
Tuner FM : 87.5 MHz - 108 MHz
AM: 522 kHz - 1,611 Khz
40 Stations
Video/Audio inputs & outputs 6 x HDMI Inputs and 1 output for 4K/60Hz ultra HD Entertainment
4 x Composite Video inputs (1 Front/3 Rear) and 1 output
3 Digital Audio Inputs (1 Optical and 2 Coaxial)
7 Analogue Audio Inputs (1 Front/6 Rear)
USB Port
Headphone Jack
W x H x D (mm) RECEIVER: 435 x 150 x 321
FRONT: 101 x 175 x 116
CENTRE: 240 x 102 x 121
SURROUND: 101 x 175 x 116
SUBWOOFER: 211 x 425 x 381
Weight (kg)  RECEIVER: 8.1
FRONT: 0.7

Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

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