Tekton Pendragons - looking for low watt SET amp


As is my custom after many hours of comprehensive research, including investing time in these forums, I'm looking for first hand insight on marrying my Tekton Pendragons (fully upgraded and bought barely used at a ridiculous price) with a good line stage and low watt SET amp.

I believe I have settled on the Truth line stage and a pair of Coincident Dynamo 34SE Mk II's. I have read reviews on the Dynamo's use with Lore's.  I suppose my primary concern is this....can the Dynamo's adequately power a pair of 4 ohm Pendragon's up to 100db.  I'd prefer to not spend more than $5,000.

Any insight or suggestions would be greatly appreciated.



64voxac30

Showing 2 responses by almarg

Again, though, Lou, the dynamic range of the recordings that are listened to is a big variable. Most pop and rock recordings are compressed to very minimal dynamic ranges, often less than 10 db (which is a power ratio of 10:1 between the loudest notes and the softest notes). While some of the classical symphonic recordings I referred to above have a dynamic range of more than 50 db (a power ratio of 100,000:1 between the loudest notes and the softest notes, and that is not a typo).

When that kind of pop or rock recording is played at an average level of say 85 db at a typical listening distance, which would require very little power with 88 db speakers, it will sound much louder than the classical recordings I referred to above, that can reach brief peaks of 105 db and require 100 times as much power. (A 20 db increase corresponds to a power difference of 100x).  Our hearing mechanisms tend to judge loudness based on average volume, not on the volume of occasional brief peaks.

Also, without having specific technical data about the wattmeter that was used I would not by any means assume it was fast enough to fully capture the amplitude of brief dynamic peaks.

Regards,
-- Al

Glen, don't forget about dynamic range.  I have many classical symphonic recordings in my collection that have been engineered with minimal or no dynamic compression, and can reach brief (1 or 2 second) peaks of about 105 db at my listening position, while having average volumes of perhaps 75 db.

To the OP -- It can be calculated that 8 watts into a pair of 95 db/1 watt/1 meter speakers will get you to just about 100 db at a listening distance of about 10 feet in an average sized room.  Having no experience with the Dynamo, however, I can't say if from a sonic standpoint it would be in its comfort zone in doing so.  Also, this assumes that the relevant specs are accurate.

Good luck.  Regards,
-- Al