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My Holton HPA-NXL800 build


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Howdy folks..

 

Merry Xmas and Happy New Year.

Finally....after 2 years I have finished my build of the Holton NXL800 amp!

Its 99.9% completed, just a few other things I would like to do, but that’s for other day.

Big thanks to Anthony Holton.

Can’t wait to start the next build and to see the new amp modules coming next year, but for now it’s time to ship this one home! I have the audio case. Just have to secure the amplifier in it and pay the freight bill 💵. 🤦🏼‍♂️😥

 

The main components were

2xHPA NXL800L modules

2xHPA PSU Two V2 power supplies 

2xHPA. Volt one Regulators 

2xHPA ss/Relay one speaker protection

Power one R4 mains controller

2.5KVa Toroidy (Audio Grade)  transformer 

2x120KVa Toroidy transformers (Volt one supply)

Completed unit weighs 53kgs😂😂

 

The labels were printed on Perspex then sprayed black for the front, while the back panel was left clear. I printed the labels first on baking paper first to make sure everything aligned before the final print.

 

The main 2.5KVa transformer is mounted on isolation feet on its own mezzanine level with the other 2 transformers mount to that.

Also included in the power supply housing is 2x12V brushless cooling fans that are controlled by a simple thermostat switch set to 40C.

 

Speaker terminals were from Dayton Audio carbon fibre wrapped....definitely sounds better 😂😂🤦🏼‍♂️
 

All the best everyone!

 

 

 

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Edited by Steven Van
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Wow very impressive build there (perhaps the best ive seen). what do you mean by "but for now it’s time to ship this one home!"? So is this going to someone else or are you building it off site?

 

Have you had a chance to fire it up and have a listen yet and what's this talk of new modules arriving next year?

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3 hours ago, Steven Van said:

Howdy folks..

 

Merry Xmas and Happy New Year.

Finally....after 2 years I have finished my build of the Holton NXL800 amp!

Its 99.9% completed, just a few other things I would like to do, but that’s for other day.

Big thanks to Anthony Holton.

Can’t wait to start the next build and to see the new amp modules coming next year, but for now it’s time to ship this one home! I have the audio case. Just have to secure the amplifier in it and pay the freight bill 💵. 🤦🏼‍♂️😥

 

The main components were

2xHPA NXL800L modules

2xHPA PSU Two V2 power supplies 

2xHPA. Volt one Regulators 

2xHPA ss/Relay one speaker protection

Power one R4 mains controller

2.5KVa Toroidy (Audio Grade)  transformer 

2x120KVa Toroidy transformers (Volt one supply)

Completed unit weighs 53kgs😂😂

 

The labels were printed on Perspex then sprayed black for the front, while the back panel was left clear. I printed the labels first on baking paper first to make sure everything aligned before the final print.

 

The main 2.5KVa transformer is mounted on isolation feet on its own mezzanine level with the other 2 transformers mount to that.

Also included in the power supply housing is 2x12V brushless cooling fans that are controlled by a simple thermostat switch set to 40C.

 

Speaker terminals were from Dayton Audio carbon fibre wrapped....definitely sounds better 😂😂🤦🏼‍♂️
 

All the best everyone!

 

 

 

8364F591-B606-4FA0-96D6-C59E90D52C30.jpeg

3C5D69ED-F78D-42B9-A1FA-FF8435D75E02.jpeg

B67E0ADE-C25F-4B18-804A-B1FC6972AC26.jpeg

5F83F524-1C76-40DD-95E1-3AAC4ACE124B.jpeg

26D8546F-BE8D-4A07-B23B-A47B2F707F6A.jpeg

992C7206-4D84-43D2-9309-9D4309E25877.jpeg

3474FCD0-6021-4447-B1DF-AA7417F1D2BA.jpeg

96B7EAD4-3AEA-4CB3-8E96-9DC054B5CBD3.jpeg

40AB2233-37B0-4CC8-9972-7BEFBAAFC15D.jpeg

7CE8A291-9563-43EB-9690-0611E9299644.jpeg

BFD60D89-A4F2-47AD-9646-AB0C4D53A9D6.jpeg

D7D706FC-532C-4AF6-B1BE-988403F2EDFB.jpeg

 Makes my six or so builds of Holtons modules look agricultural! Still sound good but.

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“Wow very impressive build there (perhaps the best ive seen). what do you mean by "but for now it’s time to ship this one home!"? So is this going to someone else or are you building it off site”

 

Hello Tubularbells.

Thanks for the kind words.

I’ve been working overseas for the past 8.5 years...so yes I’ve been building this offsite in my spare time. I live in Brisbane..so that’s where it will be shipped back too. I’ve noticed since completing my build,  that there has been some newer versions of modules come out..so I’m  hoping “Santa” might owe me something special for next year during my spare time! 😂😂 

 

 

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47 minutes ago, Peter the Greek said:

Wow! What a beast! Beautiful work.

 

Did you have the back plate made? or did Holton provide that?

The back plate I made my self. 
Then the labels are printed on clear Perspex attached to that.

Edited by Steven Van
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7 hours ago, Tubularbells said:

Wow very impressive build there (perhaps the best ive seen). what do you mean by "but for now it’s time to ship this one home!"? So is this going to someone else or are you building it off site?

 

Have you had a chance to fire it up and have a listen yet and what's this talk of new modules arriving next year?

I have fired up the amp very happy...I just need to upgrade my speakers as I don’t like them...I’m currently using B&W CM9S2 . I think they lack punch and depth, but that’s another topic. 😂

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3 hours ago, mwhouston said:

Should add I had a pair of Holton 500W modules for nearly 12 years before turning them into  working amp last year. 

Must add when I told Holton he said, “ bit slow are you”? 

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