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Hello. I just bought a Antique Sound Labs MG SI 15 DT and Im very happy with it. I was even happier when I heard that I can use the amp as a line out preamp (whatever that is). The amp can run at 5W or 15 W. With my 92db eff speakers I can get them very very loud and sound good at 5W. I then was looking for the 45 sound. So now the question is with the drd45 combined with what I have now would I be happy?
In my 12' x 12' room, the 45 DRD makes some very nice tunes via my 86 db efficient speakers (maybe "efficient isn't the word). No magic here: The speakers seem have an SET-friendly impedance, and I'm not filling a large space with sound. Now if I want to get a little rowdier and share music with the living room, then the amp's simply going to run out of gas and sound a bit hard and compressed (whereas a 300b, like the Energizer bunny, keeps going and going). And yet, not many amps out there will have singers whispering sweetly and breathily into your ear as the 45 DRD will! Darned things are practically tactile. I particularly like solid state rectification with these DRD amps, BTW.I'm not familiar with that ASL amplifier, but if it functions as a PASSIVE, resistive line stage, you may need to do some experimentation to find a set of cables (and an appropriate length of them) which gives you the best sound. Passives have been kind of frustrating to me because while they sound very "clean" and are of course quiet, I suspect they're also very touchy about the choice of output cables and so far, I haven't come up with something I'm crazy about, but I admit I haven't exactly tried too hard yet.
First, a line out preamp is simply a linestage, or preamp. It is what allows you to use several sources with your amps (such as a cd player, tuner, etc.). When using low powered amps, the additional gain provided my an active linestage is often necessary to reach listenable levels, especially with ineffecient speakers.Going "loud" with 5w on 92 db speakers may be possible, but at the louder levels, the sound and soundstage may begin to flatten out, not being optimal or providing the best sound possible with what you have. I'd guess the 45s would not cut it with your speakers, I think you'd be severly under powered. I think the 300Bs would get you to where you need to be. Or, consider making a switch in speakers, as the 45s are supposed to be well worth the switch, though the speaker options for less than two watts are relatively minimal and can be quite pricey.
Good luck.
I wanted to give more information regarding the equiment I have. My speakers are nice old JVC's. They are 92db eff W . M . The crossover is 550 hz , 4200 Hz. The speakers are rated at 6 ohm impedence. When I look at a chart supplied to me through the manual it shows the impedence. The impedence goes up to 24 ohm in 30hz to 60hz range and after that it is almost completely flat never going below 6 ohm. I heard that flat impedences are good with tubes. The room I have all of this is really small. Now for my other equipment. After checking other peoples post about the same integrated that I have. My amplifier has a pair of subwoofer outs. From what I read it is a "Sub/Line out" and "line-integrated amplifier" . So if it is true that it has a "line out" what can the amplifier be used for? As for getting the music loud. I dont have the music going loud loud but at a reasonable listening volume and this is with 5 watts; So I dont believe it is clipping or compressing. If I run two 45 monoblocks at a combined 4 watts and combine it with a active preamp the power would be similar to the 5 watts have now so I should be able to listen to it happily right?
Well, if you read the first page of the DRD offerings, you can expect 1.8 watts per side (mono block). So, that does not add up to almost 4 watts, it's only 1.8. If what you have is rated at 5 watts now, that would mean 5 watts per channel. So you need to compare 5 to 1.8. There will be a difference, though much of that may be based on the tubes and topology of the design. 1.8 can make music with your speakers, but it will be straining.As for the line out, that would usually mean that you can bypass the amplifier part of the integrated and use the preamp version with other amps. seems simple enough anyway.
If you're willing to use the 45s as they are and consider horns or something super efficient down the road, then go for it. It's usually recommended that 45s are used with a speaker at least 104 spl.
I have 45 and 300B amps driving 98-99 db speakers. Both sound great.The 300B is probably the best choice with your current speakers.
Thanks. I didnt know how the power of monoblocks were determined. I guess I will have to think about the other aspects of my system before I go for something too unique.
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