JohnDaBass

Does anyone use the 'Aux in' for their pedal board? It appears that you need to use a stereo 1/4 jackplug as a standard mono jack causes some signal loss. Anyone else had issues?

And me, do we all thrn get a badge so that we can proudly proclaim membership😈

Ordered one for £15.52 due Friday, looks like great value. Compact size will fit neatly onto the pedal board. Thanks for the heads up.

Here's the response from Bluearan following my email to request a returns authorisation for them to retest the defective Beymer SM212. [color="#000000"]Hello Mr Evans, I am sorry to hear that the speaker has developed a fault. If the cabinet is tuned to 51Hz and the bass is played at low E, which would be 41.2Hz, then the speaker will be running below the tuning frequency of the box, meaning that the driver becomes effectively unloaded. When this happens the driver can over-excurt and hit the back stop of the driver which would account for the cracking sound of the driver. You can return the driver for inspection at the following address, but if the driver has over-excurted then this would not be covered by the warranty.[/color] [color="#000000"]I am not sure whether i[/color]t's worth the cost of shipping the unit back for retest only to find that Bluearan conclude that it is not a manufacturing defect and so will not be replaced. Probably best just to buy new?

Following advice from Stevie and Phil from Basschat 12 cab design fame of this parish I ordered the Micro Thumpinator to add some protection to my speakers. Bought the A-B Bright Onion switch to increase control of my Tech 21 VT Di on my pedal board. Once I added both new pedals I was so surprised how the Thumpinator tamed my whole sound. I love deep warm old school bass but until the advice from Stevie and Phil I just did not realise how much harder my amp and speakers were working. Clearly the amp and cabs were trying so hard to output the sub 30Hz stuff that I was losing so much great tone. I still get the sound I desire but far more efficiently and far more accurately. Thank you Phil & Stevie. My next move is to add a Mesa Boogie Subway pre-amp when they become available in early December ,£220 seems to be a great price!

[quote name='walbassist' timestamp='1476266883' post='3152782'] Damn it, I just bought the D800. If I'd known this was coming....... [/quote] If you plan to upgrade can I have first dibs on the D800??

Thank you Verb

Hi Everyone, Does anyone have a circuit diagram for a Trace Elliot 7 Band Graphic EQ pedal? Does anyone know of any links where I could get a copy or does anyone know the value of Diode D5? Thanks. John

Hi All, I have checked the tuning frequency of both Mk1 & Mk2 cabs using the online tone generator and grains of rice. I have also rechecked all the as built internal dimensions and actual port aperture sizes. John DaBass DIY Mark 1 cab [attachment=229022:JDB_Mk1.jpg] cab is 12mm ply with an 18mm baffle set back 35mm from port mouth. Internal 235 x 545 x 430 Volume = 55Ltrs Port 33 x 475 x 230 ( port area is 156 sq Cm or equivalent to a 140mm diameter round port) Measured tuning frequency = 51Hz The simple www.linearteam.dk calculator estimates that the tuning frequency should be around 50Hz This is the cab that the Beymer SM212 may have been damaged. John DaBass DIY Mark 2 cab[attachment=229023:JDB_Mk2.jpg] cab is 18mm ply Internal 245 x 494 x 445 Volume = 53.86 Ltrs Ports four ports 66mm Diameter 180mm long Measured tuning frequency = 61Hz The simple www.linearteam.dk calculator estimates that the tuning frequency should be around 58Hz If I increase the port length to 230mm the tuning frequency should be close to 52Hz There has been no issues with the Beymer SM212 in this cab. I apologise to everyone as perhaps I should have started this post in the Build Diaries thread.

Hi Stevie, Thank you for your contribution. I will try the rice test on both Mk1 & Mk2 cabs with the same good speaker and post the results. So am I correct in my understanding that because the port tuning frequency was too high I actually drove the speaker voice coil beyond it's allowable travel limit (Xmax). So damaging the speakers performance. I have to say that I was unware of the dangers of such a mismatch of port tuning and Xmax. I always thought that when the speaker got to its limit it would complain a bit and that would be the time to reduce the juice. It just goes to show how much us novices can learn from guys like you and Phil. Thanks for your valuable help and experience. John

Hi Phil, Thank YOU for your analysis.The cab and speaker really sounded great but sadly the speaker is 6 weeks outside the 12 month warranty period. I plan just to buy another SM212 from Bluearan. Thank you again for your continued help and support to all of us on Basschat! I am sure that there are many on here who, like me go straight to any new posts from an Ol'Sage like you. Thanks John

Hi Phil Gear details cab in my DIY Mark 1 internal 245x425x540 external 566x440x300 vol 56.23lts shelf port 540x35x230 Amp Fender Rumble 500 head settings gain 7 o clock (minimum) Bass 3 o clock Low Mid 12 o clock - flat High Mid 12 o clock - flat Treble 12 o clock - flat Master 9 o clock No effects or pedals. Guitar Fender active PJ Volume max pan P pup solo T M B all set middle position - flat I hope this helps with throwing some light on the root cause of the speaker failiure. The speaker is not dead (Voice coil open circuit) just very distorted with loud random 'clicking' noise from open A downwards. I have no problems with my DIY mark 2 cab (the one you suggested adding the fourth port) now that it has four ports 66mm dia and 180mm long. Brs John

Has anyone experienced any quality or performance issues with these drivers? I have blown one driver and I was wondering if anyone else has had similar issues. Thanks for you feedback. John DaBass

Fender PJ active or EBMM Sterling both with flats into a Fender Rumble 500 V3 head into a Barefaced Super Compact 1x12 plus a BassChat 1x12 when reqiired. Plenty of old school thick heft on tap!