Boosting the Output Voltage of a Sonos Connect [Archive] - Audio & Video Forums


View Full Version : Boosting the Output Voltage of a Sonos Connect

08-22-2016, 08:02 AM

I purchased an Onkyo A-9050 as part of a whole house solution for two reasons. 1- Pre Amp Outs, and 2- Auto Standby.

Inputs are 1- Sonos Connect and 2- CD Player

I never tested with the CDP, but when putting the unit into Auto Standby, even with the Sonos playing Pandora, the Onkyo shuts down in 30 minutes as if not getting a signal.

I spoke to their Tech Support this morning and they felt that maybe the Sonos is not sending a strong enough signal to let the Onkyo know it is active. Variable Volume is being used, the Onkyo is set to 12 o'clock and all rooms have their own volume controls and overall volume is controlled by iPhone App.

I found this Line Level Signal Booster and trying to figure out if it would do the trick of sending a stronger signal from the Sonos to the Onkyo.

Line Level Gain Boost (

Any help or other suggestions would be great.

08-22-2016, 10:26 AM
One wonders whether Onkyo tech support isn't passing the buck on this, but it's still quite likely that a signal boost would solve the problem; does the Sonos have a variable output such the it could be set higher?

Anyway, bear in mind that the LGB-1 booster device is, in fact, an amplifier so that it could have some affect on the sound quality.

08-22-2016, 10:40 AM
That unit looks very interesting. I did not know that they exist so I did a little investigating. Here are a few others-

MCM Custom Audio Stereo Line Level Amplifier Adjustable 0 ~ 15dB Gain | 50-14820 (5014820) | MCM Custom Audio (

I may pick one of these up for my son to use with his Pass B1 preamp that we built. It has no gain. I might get the top one to convert single ended to XLR so he can use the XLR's on a Parasound A21.

I would like to know how these devices affect the sound and if they can be used between a DAC and preamp.

08-22-2016, 10:59 AM
Thanks guys, SQ is no issue for these people and right now it sounds better than the Yammie HT it replaced.

The Sonos does have Variable/Fixed but if set to fixed you cannot use the Volume within the App and have to use the volume on the Onkyo, which is burried in a basement closet, so not happening.

I need to retest the system with the CDP to see if sympton is same or works as expected.

The Sonos will put out the full 2 Volts in Fixed but less in Variable so they may be on the money here.