I've lost my bass....


Well, not all of it. My system is:

Arcam CD92
Marantz 2020 (Don Scott modified) Tuner
Conrad Johnson PV14
Conrad Johnson MV60
Audio Physic Virgo III
HT Pro 9 Interconnects
Synergistic Research Sig. 2 Speaker Cables

This is my first tube system and I love it. I had this system in a 15' x 23' room and I thought it was outstanding. Mids and highs were exceptional and bass was firm though clearly not registering the lowest octaves. I was OK with that.

Here's the problem. I needed to put my Home Theater system in the room where the stereo was and put the stereo where the home theater was. The furniture and carpeting was also switched at the same time. Now the stereo is in an "L" shaped room that is bigger than the previous one. As a result, the bass repsonse is not nearly as authoritative as it was in the smaller room (no surprise).

My question is, what can be done to improve bass response? Some issues I've thought of are:

1. Room treatment? What kind?
2. Try different tubes (FYI, MV60 is EL34 based amp)? Any suggestions?
3. Amp is underpowered?

I'm open to any ideas on how to improve bass response.

Thanks to all for any help.
Dave
milo

Showing 1 response by john_l

A few things to try.

1. Push the speakers either 1/5 or 1/3 out into the room and try moving them around until you hear the bass get stronger. You might want a friend to help you with this. Even better, I would reference the AP setup guide on www.immediasound.com or the cardas setup guide on www.cardas.com. If you follow these carefully, often times you might find a big increase in performance. I've found with the AP's that placement can have a large impact on bass.

2. Try closing any doors. If the speaker has a smaller space to pressurize it will evidence more bass.

3. Try moving the speakers closer and further apart while listening for more bass. Following the setup guides will probably get you fairly close but moving/listening will get you to the place where the speaker is truly working with the room. Just small amounds of 1-3 inches should do it.

4. Clean your interconnects and contacts using contact cleaner. This tends to improve bass. Also try to use the shortest interconnect cables possible and perhaps experiment with cables. I like Nordost Red Dawn on up and Cardas Golden Reference cables with the virgo's. For less expensive I have had good results using Harmonic Tech Truthlink ic's (or red dawn) and Acoustic Zen Satori speaker cables. The Zen speaker cables are a great way to go.

5. Your amp is a on the small side with the Virgo's. I used to run an MV-50 with my old Virgo II's and I recall that it was not exactly a bass monster but still a wonderful sound. I remember swapping in a 185 watt per channel McCormack amp caused the speakers personality to change dramatically - they had much stronger bass. Almost seemed like a different speaker. It was going from 45wpc to 375 so this should not have been a surprise. If the above did not help I would try first using a borrowed/extra amplifier to see if this indeed will solve your problem. Your preamp is also known for slightly recessed bass. I'm not surprised by what you are reporting. Make sure the amp is biased and perhaps try swapping in some Svetlana EL-34's. Those are Mullard copies and exhibit some nice strong bass.

Disclaimer: I do sell Cardas and Audio Physic.