Injecting one sub to Benchmark system…

Noob here and just hooked up my new Benchmark AHB2 and DAC3 HGC with pair of Totem1 bookshelf speakers.

I have a Velodyne SPL-R series subwoofer and would like to connect this. I’m seeing a lot of varied advice on the web on how to do this and thought I would come here for better advice.

Not even sure if the sub would connect to the preamp or the amp….any suggestions?



Thanks myjostyn, I’m just finding that out now as I hooked up the sub about a half hour ago. To add to the confusion I’m still trying to really get my room treatment sorted out and get rid of muddiness without the subwoofer. Something just isn’t right there, just way to muddy. It’s getting to the point where I don’t even know if it’s possible to get this system sounding good in an 8x12 room.

quick question….on the Velodyne I’m going into the LFE and not the speaker level inputs. On the outputs on the DAC3 there are two pairs, both pairs are white outputs while on the sub inputs there is a red and a white….how do I tell which of the two whites on the DAC3 go to the red on the sub or does it even matter?

thomas, I love mijostyn. His system is terrifically satisfying. Judging by that system and his unbelievably well appointed wood working shop I'd say he has a financial foot up on most of us here. I know I'm envious.

Yes, you can absolutly have excellent bass reproduction at the listening position with one subwoofer.

To the left of the four white RCA outputs on your HGC. The upper two RCA's are labeled L (Left) and the bottom two are labeled R (right). The bottom R output will connect to the red (Right) input of the subwoofer.

Below is the Velodyne SPL-R series Manual 

Does the layout on the Front Panel Features of your SPL include the (4) MIC input as in the drawing on page 5 of the SPL-R Series Manual? 

There are two different looking Remote Controls both have the same function buttons as the one pictured on page 11 of the SPL Manual. Do you have the Remote Control? 

Hi M-db, thanks a lot for that!

My remote for the sub doesn’t seem to be working so I popped an email off to Velodyne today to see if they can sell me one as I’m flying back to the US tomorrow for about a week.

Front panel - mine has no switches on the front at all. I’m guessing mine is probably over 15 years old.

re. two subs in my 8x12 room - im wondering if even one is too much!

Anyway guys, thanks a million for all the input, I’m flying for 30 hours tomorrow (with stop-overs), so won’t be checking in here, just don’t want anybody thinking I’m ungrateful.

thomas, SPL 10 RCH doesn’t seem to bring up any information. Though I did find this which may help.

Below is a link to an earlier SPL User’s Manual

The Sub on the cover lacks the Front Panel Features. Notice on page 2 the MIC INPUT (7) is on the back panel. On page 6 the earlier Remote Control is pictured. If these differences match your SPL you may simply need to replace the Remote Control’s battery and purchase a calibrated mic to perform the EQ feature.

Lacking in all Velodyne User’s Manuals until their Plus series is the need to preform the Crawl Test to locate your rooms loudest bass mode where the sub should be located. This is critical for single sub use.

Velodyne’s onboard EQ is easier to use, far more detailed and includes the four EQ Presets compared to the suggested MiniDSP and DeSpeaker.

FYI, Velodyne Acoustics is now located in Hamburg, Germany.

I was in this situation in about 2006 with a dac1 and a sub.  The new models may be different but I thought back then that I really lost something by having the DAC output going to both an amplifier and a sub.  I'd at least experiment with getting an adapter and running the sub from the headphone out.  I eventually got a regular preamp and I thought that was a substantial improvement in definition through most of the frequency spectrum.  I'd also experiment going power amp to sub because that definitely won't take away from the low level signal that is easy to mess up.  

I think the time has arrived for people to experiment with cheap performance oriented electronics.  I've recently bought a couple of <$150 Schiit products and they're great.  At work I have a Fiio x7 to Schiit Magni+ powering DCA Aeon Noires and it's great.  Nothing about that setup bothers me and I'm pretty easily bothered.  If a preamp died on me I would not hesitate to try a $599 Freya S.