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This is why you should have a listen. They do dynamics well. both push pull & single ended.

I found the Border Patrol has more grunt than the Art Audio. It's not just down to the transformer. You have to look at many other factors. The power supplies are very important. For example, the Border many for the various types of the circuit. Also the type of power supply. the Border Patrol uses a choke input types which offer very good regulation and filtering. This sort of power supply is only used by a few people. One reason is the cost and it is harder to put in properly.

Also you have to look at how each valve is biased as well. Also the type of valve & Interstage transformers used to drive the output 300B is very important. This has a big bearing on the sound. Interstage transformers can give an valve amp good grip & drive to the sound but are costly.

An amp can run out of stream with good transformers. It will be the power supply (or supplies) that count for a lot of the sound.

Most 300B amps have the mid range but can be lacking on the extremes and soft in the dynamics. Some of the best ones I have heard have interstage transformers & choke input power supplies to give you good dynamics.

If you want to go down the 300B path, you need to listen to many as the have different design features.

SCIDB

<blockquote data-quote="SCIDB" data-source="post: 621497" data-attributes="member: 1013">This is why you should have a listen. They do dynamics well. both push pull &amp; single ended.I found the Border Patrol has more grunt than the Art Audio. It's not just down to the transformer. You have to look at many other factors. The power supplies are very important. For example, the Border many for the various types of the circuit. Also the type of power supply. the Border Patrol uses a choke input types which offer very good regulation and filtering. This sort of power supply is only used by a few people. One reason is the cost and it is harder to put in properly.Also you have to look at how each valve is biased as well. Also the type of valve &amp; Interstage transformers used to drive the output 300B is very important. This has a big bearing on the sound. Interstage transformers can give an valve amp good grip &amp; drive to the sound but are costly.An amp can run out of stream with good transformers. It will be the power supply (or supplies) that count for a lot of the sound.Most 300B amps have the mid range but can be lacking on the extremes and soft in the dynamics. Some of the best ones I have heard have interstage transformers &amp; choke input power supplies to give you good dynamics. If you want to go down the 300B path, you need to listen to many as the have different design features. SCIDB</blockquote>

[QUOTE="SCIDB, post: 621497, member: 1013"] This is why you should have a listen. They do dynamics well. both push pull & single ended. I found the Border Patrol has more grunt than the Art Audio. It's not just down to the transformer. You have to look at many other factors. The power supplies are very important. For example, the Border many for the various types of the circuit. Also the type of power supply. the Border Patrol uses a choke input types which offer very good regulation and filtering. This sort of power supply is only used by a few people. One reason is the cost and it is harder to put in properly. Also you have to look at how each valve is biased as well. Also the type of valve & Interstage transformers used to drive the output 300B is very important. This has a big bearing on the sound. Interstage transformers can give an valve amp good grip & drive to the sound but are costly. An amp can run out of stream with good transformers. It will be the power supply (or supplies) that count for a lot of the sound. Most 300B amps have the mid range but can be lacking on the extremes and soft in the dynamics. Some of the best ones I have heard have interstage transformers & choke input power supplies to give you good dynamics. If you want to go down the 300B path, you need to listen to many as the have different design features. SCIDB [/QUOTE]

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