So what do you think of Class D amp for subwoofers

Guido - Issue of the noise came in Stereophile review of Channel Island D100 (Hypex) only because test instruments listen to much wider frequency range than necessary. Yes - all class D amps produce some noise but it is in hundreds of kilohertz - non-audible and not in the FM or TV bandwidth. Any amplifier produces switching noise - even class A or tubes. It comes from power supply (sharp current spikes repeated 120Hz).

As for D100 - it is very good amp. Stereophile says that is "going head to head with an amp as good as the Coda S5". (good class A amp).

Reading your post one would think that D100 is bad sounding or very noisy.

Ah yes, I do remember the discussion. . . tell the truth, I happen to kind of agree with the raw findings of the panel when they reviewed individual amps. . . what I have always problems with is the infimous application of the generalizing induction step. It is worth observing that the amps TAS examined were relatively early products created specifically to meet a particular price point. Most of those products have since then been replaced or enhanced. The Spectron for example, has been significantly enhanced since then. . . recent Spectron entries cost upwards of $22K per monoblock pair with performances to match. The Rowland 201 monoblocks conversely are still current production. They were, and still are the entry level monoblocks of the JRDG product tear and are in consequence designed to meet their price point. JRDG has amps costing upwards of $30K, also with performance to match their price points.

Let us ask ourselves the following: would it be particularly meaningful to promulgate blanket condamnations of the current state of the art in tube amplification, including such extremely high end devices as ARC Reference 610T or VTL sigfried, by generalizing on some supposed shortcomings discovered several years ago in some now obsolete entry level designs?

G.

I've been out of town for the last four days and just got back. I'll read up on all the posts and write a bit more tomorrow. Thanks for all the responses!

Spatialking,
I have a Mcintosh pre in front of a Mc power amp (300x2)driving the front and a Cerwin Vega (2800x1)driving 2-Electro Voice EVX 180's. In my apinion,you do'nt need a reel good amp for bass. The bass is tight hard hitting and the Mc run very cool because it's not driving any bass.By the way,I use a E.V. 2 way active X-over that has a sub out.I bought the class H amp new for around $450.
It costs a lot more to have the Mc serviced and I bet I won't have to have the Mc serviced for a long time because it's not driving the bass. If I blow the C.V. it's no big deal. Just buy a new one. Take care,Bill