Post by myles on Feb 8, 2006 12:08:37 GMT -7
There has been activity in the tubes posts and 6545 posts where the 6545 / SRZ-65 amps have been mentioned. I posted some info in these places but I am copying what I said in another post in reference to the SRZ-65 and putting it here also:
Johnny,
Since you mentioned the SRZ I thought I'd say a few things here on this amp I have said a bit elsewhere in regard to the 6545 and SRZ-65.
The SRZ-65 has a strong tie in design wise with the Marshall JCM 800. The JCM 800 is considered one of the landmark rock amps of all time. This was not always the case for all. Mike Doyle (The Marshall Book) thought the JCM 800 was one of his least favorite Marshalls until one day by mistake he plugged a JCM 800 into an old Marshall cabinet. The 800 became one of his favorite amps at that point. He had discovered that the speakers used in the newer cab were not all that great and the JCM 800 really shined when the older Marshall cabs were used.
These amps look simple but because of their cathode tone follower front end (gets brighter the harder you hit the strings as an example) and the cascaded gain (Z does not use this design topology much in his other amps), these amps are very responsive to tube changes. I prefer V1 to be a slightly lower value compared to V2 which is going to amplify the signal from V1 even more than an amp without a cascaded front end. This way I can use high output pedals more easily without driving the amp's front end into compression and mush as fast.
There are a lot of tricks you can do with tubes in V1 and V2 on these amps. I will be in the process over the next few weeks developing tube sets for these amps as Carl Verheyen is looking at SRZ-65s to replace his original Marshall amps that are becomming too valuable and fragile for tour use.
But .... the SRZ 65 is not a JCM 800 in all respects. Think of a tweeked JCM 800 such as those of Jeff Beck etc. These have been looked at a bit more closely than your run of the mill amp. The SRZ-65 has aspects missing in the JCM 800. The tube rectifier gives the amp player touch and swell (and a nicer sustain characteristic). The tone controls are more effective than any you will find on a JCM 800 for the most part. There are other changes too including nicer transformers and tone caps that are more transparent than the originals. I guess the bottom line on the SRZ-65 is that it is the best sounding Marshall JCM 800 that was ever built or something to that effect.
In any case, I will be happy to continue to help you whenever you'd like.
Johnny,
Since you mentioned the SRZ I thought I'd say a few things here on this amp I have said a bit elsewhere in regard to the 6545 and SRZ-65.
The SRZ-65 has a strong tie in design wise with the Marshall JCM 800. The JCM 800 is considered one of the landmark rock amps of all time. This was not always the case for all. Mike Doyle (The Marshall Book) thought the JCM 800 was one of his least favorite Marshalls until one day by mistake he plugged a JCM 800 into an old Marshall cabinet. The 800 became one of his favorite amps at that point. He had discovered that the speakers used in the newer cab were not all that great and the JCM 800 really shined when the older Marshall cabs were used.
These amps look simple but because of their cathode tone follower front end (gets brighter the harder you hit the strings as an example) and the cascaded gain (Z does not use this design topology much in his other amps), these amps are very responsive to tube changes. I prefer V1 to be a slightly lower value compared to V2 which is going to amplify the signal from V1 even more than an amp without a cascaded front end. This way I can use high output pedals more easily without driving the amp's front end into compression and mush as fast.
There are a lot of tricks you can do with tubes in V1 and V2 on these amps. I will be in the process over the next few weeks developing tube sets for these amps as Carl Verheyen is looking at SRZ-65s to replace his original Marshall amps that are becomming too valuable and fragile for tour use.
But .... the SRZ 65 is not a JCM 800 in all respects. Think of a tweeked JCM 800 such as those of Jeff Beck etc. These have been looked at a bit more closely than your run of the mill amp. The SRZ-65 has aspects missing in the JCM 800. The tube rectifier gives the amp player touch and swell (and a nicer sustain characteristic). The tone controls are more effective than any you will find on a JCM 800 for the most part. There are other changes too including nicer transformers and tone caps that are more transparent than the originals. I guess the bottom line on the SRZ-65 is that it is the best sounding Marshall JCM 800 that was ever built or something to that effect.
In any case, I will be happy to continue to help you whenever you'd like.