Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 10 of 10
  1. #1

    Member Sales Rating: (0)

    Join Date
    Jul 2013
    Location
    Vancouver BC
    Posts
    82

    Red face Rivera Hammer 320 - Can I modify it to run fanless.

    Hey everyone,

    a while back I stumbled onto a rivera hammer 320 tube amp (160 wpc rms).
    The issue I'm having is at low volumes I can hear the fans.
    It was designed as a rack mount with a sealed top cover.

    I was wondering if I made some sort of cage cover (which would run just on the top and round over at the back... the sides would be sealed) could I disconnect the fan?

    Do you think the tubes would overheat?

    As you can see there are spaces around the Rivera lettering, the fans push the air out through them.

    The amp has some cool features... like adjustable presense and focus one of which adjusts the dampening factor, switches on the back to choose between pentode and triode mode. It was designed to be a studio amp as well as a guitar amp and is known for being true to the signal with very little coloration.

    I'm currently running the sda srs 2.3 and the sl2000 seem to have lost their harshness while still remaining live sounding (you can adjust the brightness through the pressence control)

    Here is the site with info on it: http://rivera.shptron.com/p/tbr-5-ha...-new-old-stock
    It has an inside shot of the tubes.

    Thanks for any advice in advance
    Attached Thumbnails Attached Thumbnails Click image for larger version

Name:	riv2.jpg‎
Views:	38
Size:	8.2 KB
ID:	91378   Click image for larger version

Name:	riv1.jpg‎
Views:	41
Size:	6.9 KB
ID:	91377  

  2. #2

    Member Sales Rating: (0)

    Join Date
    Jan 2009
    Location
    Rocky Top TN
    Posts
    393

    Default

    I'd say from looking at it that it's fan design was to accomodate the idea it'd be racked, surrounded by other hot devices and they wanted the protection the cover offers. Designed for the typical pro environment.

    You could probably run it very safely with the cover completely removed. It'd be just like every other tube amp of that style then. Make notice of other tube amps that use a similar tube compliment, and you've got a good guideline for what you can get away with. If you need a cover, then make one from some kind of heavily perf'd material. Every bit of blockage it would have would be of concern as raising the heat.

    Also, note if the bottom cover has opening to allow intake air. If so, make sure your placement method allows for what's intended. If there is air flow thru the deck possible, then even if it doesn't have bottom intake, you might make a bottom cover that would allow the typical upward flow of warm air to help with air movement past the tubes.

    In any case, an amp like this when fanless and set into a rack needs lots of free air space around it. As in don't have a shelf closely above it!

    CJ
    As seen on the AVS forum... "Radio Shack zip cord kicks butt."

  3. #3

    Member Sales Rating: (0)

    Join Date
    May 2009
    Location
    Edmonds, WA
    Posts
    1,726

    Default

    I 'hear you' about wanting to get rid of fan noise :)
    What I would suggest is upgrading the fans. IDK if I would just eliminate the fans... Would hate for you to burn something ;)
    From the pics on the linked page, they look like standard 80mm fans. You will need to check the power connectors for compatibility. (should say size on them) FYI, the larger ones move more air with less noise, hense if you can use a larger one, 120mm are usually quieter than 80mm.

    There are some really quiet, variable speed fans made for computer cases, and most of the better ones are super quiet and also some have a temperature control for the speed. That way, if it does get hot, the fan speeds up, otherwise you can't really hear them.
    Also adding rubber isolation grommets at the mounting point can help with the sound transmission factor as well.

    Here are a couple I found in a quick search on Newegg. If you have a good computer store around, they will have them as well.
    (read 'not bestbuy')
    Look for the lowest dB rating.. the best ones are around 18dB... can't hardly hear them even when right in front of you.

    http://www.newegg.com/Product/Produc...&name=Variable
    Last edited by kcoc321; 11-03-2013 at 04:10 PM.

  4. #4

    Member Sales Rating: (0)

    Join Date
    May 2012
    Location
    Pittsburg, CA
    Posts
    327

    Default

    Hi

    Why don't ask Rivera about running with no fans on well ventilated non-rack mounted environment.

    Cheers
    AVR-Onkyo709
    AMP- Parasound 2125, Adcom 585
    Mains for HT and some Music- RTi12s
    Main for Music only- Linn Keilidh or Usher V-601
    PreAmp for Music: B&K AVP-3090
    Rear- RTi8s
    Center-CSi5
    Sub-JBL L8400P 12"
    Player- Oppo BDP-103
    TT: Philips 406
    Phono Pre-Amp: BBE FJB-200X

    Bedroom rig:
    Pionner Elite VSX-30
    Onkyo CS-5VL SACD Player
    Polk Audio LS70
    Hunting for a sub...

  5. #5

    Member Sales Rating: (0)

    Join Date
    Jun 2012
    Location
    Pearland Texas 77584
    Posts
    1,840

    Default

    There are lower noise fans out for computers that push the same amount of air they usually have 3x more vanes than a regular case fan. So you can run them at a lower rpm and get the same airflow
    Last edited by PolkieMan; 11-03-2013 at 04:52 PM.

  6. #6

    Member Sales Rating: (0)

    Join Date
    Jul 2013
    Location
    Vancouver BC
    Posts
    82

    Default

    Wow, you guys are awesome.

    I will email Rivera about it, good call.

    To be safe I could probably run some quieter fans.

    I would still love to leave the top open to see more of the tube glow.

    Thanks for all of the replies.

    I need to refinish the top cover as there are some deep scratches in the metal, maybe sandblast and paint it a matte black.

    Thanks again,

    Mike

  7. #7

    Member Sales Rating: (0)

    Join Date
    Jun 2012
    Location
    Pearland Texas 77584
    Posts
    1,840

    Default

    I would go with a shiny gloss black I used this on the top of a Sony Mega Cd player and it came out pretty nice.
    Rust-Oleum Appliance Epoxy
    http://www.homedepot.com/p/Rust-Oleu...9#.UncA2-I4GaU

    http://www.amazon.com/Cooler-Master-...ter+fan+silent





    Quote Originally Posted by MAD View Post
    Wow, you guys are awesome.

    I will email Rivera about it, good call.

    To be safe I could probably run some quieter fans.

    I would still love to leave the top open to see more of the tube glow.

    Thanks for all of the replies.

    I need to refinish the top cover as there are some deep scratches in the metal, maybe sandblast and paint it a matte black.

    Thanks again,

    Mike

  8. #8

    Member Sales Rating: (0)

    Join Date
    Jul 2013
    Location
    Vancouver BC
    Posts
    82

    Default

    Just emailed Rivera... why didn't I think of that.

    I'll keep you all up to date.

    Thanks

  9. #9

    Member Sales Rating: (0)

    Join Date
    Jul 2013
    Location
    Vancouver BC
    Posts
    82

    Default Update

    No emails back yet…

    I am however really enjoying the tube amp. At first, compared to my kenwood 700m, I felt like something was missing, but I realized that all the details are there… it just sounds smooth and different.

    I can't really describe how, it is definitely not as fatiguing and the human voice sounds very realistic.

  10. #10

    Member Sales Rating: (0)

    Join Date
    Jan 2009
    Location
    NW Indianapolis Indiana
    Posts
    9,137

    Default

    Personally if you plan on replacing the fans... use these. Worth the 17 bucks.

    http://www.newegg.com/Product/Produc...82E16835608028

    I run one in my mini PC and its inaudible for me. I also run 5 of them in my desktop tower and they have been running 24/7 for over 4 years and have yet to even try to burn out.

    Decent sound profile, last forever and move a decent amount of air.

    Also if you could find a way to connect them to a fan controller with a thermal probe you could ensure that they only kick in a temp X. I have a fan controller on my computer and all my fans run at 1000 rpm and again are inaudible.
    Advice is free, the Flea Market is earned - F1Nut

    Main HT: APC H15 | Pio 51FD | Uverse DVR | Xbox 360 | Squeezebox Classic | Integra DTR 5.9 | Carver AV-705x & M1.0t MKII Opt002 | LSi 15 | LSiC | LSi F/x | Kimber Hero IC & 8VS SC

    Office Rig: Win 7 -> DacMagic w/ Pangea PSU | Pro-ject Debut III | Sunfire TGP-II | Parasound HCA-750ii | Polk RTA 11TL | Cables TBA

    Bedroom: Uverse DVR | Roku 2 | Samsung LCD | SurroundBar 2000

    Sales Rating
    Gear

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Hammer Time
    By Pauly in forum The Clubhouse
    Replies: 1
    Last Post: 05-28-2009, 02:55 PM
  2. The Hammer
    By bobman1235 in forum Music & Movies
    Replies: 5
    Last Post: 09-06-2008, 11:25 PM
  3. Karma Hammer of the Gods
    By Pauly in forum The Clubhouse
    Replies: 27
    Last Post: 08-24-2008, 01:28 PM
  4. The Hammer
    By zingo in forum Music & Movies
    Replies: 3
    Last Post: 03-20-2008, 09:32 PM
  5. Hammer and Coop
    By Ron-P in forum The Clubhouse
    Replies: 16
    Last Post: 02-21-2007, 10:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts