next step for my setup? advice appreciated

Hi Guys,

thanks very much for the input. As a guitarist, I'm very interested in going tube somehow, but don't have the budget for it.

My budget is sub $500 and I'm a DIYer, so I'm happy to build my own DAC or even attempt a preamp.

Jylee: so you're suggesting I can add a tube pre to the pro and run them separately? I assume I'd have to reconfigure how my sub is setup. (My processor sends out an LFE signal just to the sub.)

As for the GR Research speakers, I'm very happy with them and would only upgrade them to a higher end GR Research. People make very bold claims about this kit, but having built them and compared them to paradigm studios and B&W Cms, I think the claims are valid. All that to say, I'm very happy with them.

Thanks again for the input. I'll explore building a Tube DAC or researching tube pre or power amp

thanks

Steve

Yes, I think a tube preamp will go a long way. Your Oppo will also go a long way. You can integrate stereo preamp to your processor. You'll need HT bypass output from the preamp. Integrating with subwoofer can be done as well. If the sub has dual input, you can connect one from LFE output of processor and one from right channel of the preamp.

Hi,

Glad to see some DIY speaker builders out there. I've built the Gr-Research AV-1, three pairs of Murphy Blaster MBOW-1 for various friends, the Ellis Audio 1801B, and a number of Selah Audio Subs. I think my favorite of the bunch is the MBOW-1 matched with a sub. Amazing sound for the price.

Regarding your question, I am with others here; scratch the idea of a tube buffer. I like the idea of a tube DAC, but I am not familiar with any DIY designs. One issue that you will have with less expensive tube DACs is that you might lose linearity at the frequency extremes. An example of such would be some of the MHDT Labs offerings; not necessarily flat in frequency response, but very musical sounding. Throwing a tube in with your solid state amp will do some nice things.

A decent tube preamp kit is the Trancendent Sound Grounded Grid. The sound is more quick and light than slow and heavy, but the kit directions are easy to follow. The only thing I didn't like about the kit are the stock volume control and the cheap rotator switch, but I swapped them out.

Also, another option would be to build the Pass Labs B1 buffer, although you would have to source the parts yourself. You can buy circuit boards and matched jfets from the PassDIY web site. Its not tube based, but it sounds very good.

Where are you located?

A DAC will sure help out the 980. Tube or SS, that's your call.

I'd prefer add a tube preamp at this point were I in your shoes.

Before that though, I'd consider cabling. Power cables, ICs... etc.

That Oppo and the Rotel amp both respond well to power cord upgrades. Also, I'd fiddle with the isolation (footers) and maybe even a damping weight set on top of the Oppo.... I prefer Herbie's iso cups with the Ebony balls for mine.

it will suprise you what just some footers and a pc for that Oppo can do. For the amp too.

A tube preamp however would my my goal ultimately.