Help me with first mobile rig |
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Sapro2
Registered User Joined: 31 January 2015 Location: Somerset Status: Offline Points: 354 |
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Posted: 29 March 2017 at 10:41am |
Hi, I bought a Bass Face Db4.2 back a while. Build quality was crap, broke off one of the speaker connectors within a week. Also, I am not sure about the power ratings didn't seem loud to me. Went back to using my old amp after a short time. I am afraid I couldn't recommend them. Cheap tat. |
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Splat Soundsystem
Baby Sham pram Soundsystem Sapro - SoundCloud https://soundcloud.com/sapro DJ Sapro. West country free party DJ and Producer. |
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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hahaha sorry man, and big thanks for your projects and your helpfulness. we usually run reggae with our rig but for carnival we had some tekno djs and they where amazed from the system, so another proof that the cubo kick kicks as it should.
By the way i was ready to fight clipping all night but the tekno guys actually showed up with a dbx compressor/peak limiter intended to protect the system ; i've got my protective limiting and had ample headroom for the night so we didn't use it and kept all the dynamics intact without problems, but i did appreciate the effort and furthermore the djs kept the levels on the desks in check all night; i was providing generous levels though. did you ever put an efficency number on cubo kick 15, 18 sound loaded as per project? in my calculations i use 102db/w but i'm almost sure it's higher (better to be conservative and surprised later; i could be wrong but i feel it is less sensitive than mt121 12" with 18sound mb700 that in turn is less sensitive than the comp above that should hit 111 db 1w 1m with same horn i'm using)
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charlynch
Registered User Joined: 24 September 2011 Location: Somerset UK Status: Offline Points: 189 |
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mobiele eenheid is Mr Cubo
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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mobiele eenheidthanks, i knew i could reduce the reflex duct size, but i remeber mr cubo saying this would reduce output below 100hz... can't create energy from nothing! will have to see how much spl loss that means.
Anyway very useful to know this 10hz/port rule. did you try it? noticed the difference in efficency?
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Hi
So much for studying So db 1.2 + Pioneer gmd would cost some 370 euros plus batteries. A Little too Rich for my Blood... I was thinking about a bridgeble 4 Channel Digital with band pass filter to keep cost down.2 Channel on bass 2 on midtops. I saw bass face blackdb4.1 for 200 euros 4 x150 @ 4 ohm , 4*225 @ 2 ohm declared rms. Any opinion? How much Can i trust bass face rms Watt rAtings? For 230 i saw a ground zero class d 4 Channel 4*70/4*130... Comments? Experiencies? Thanks! |
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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Cubo Kick 15 has 3 dividers/ bracing in the port at equal distance, this creates 4 ports of equal size. All ports open tunes the reflex section to about 80 Hz, if you start closing the individual ports, tuning goes 10 Hz down for every closed port. So you can tune the reflex section to 80 Hz, 70 Hz, 60 Hz and 50 Hz respectively. Around 50 - 60 Hz should be usable for a 12 V system.
Johan |
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Yup bassface 1.2 is the one.
If you want to exaggerate bass like above - well the bassface amp will likely be OK, but then get a substantially bigger battery for the bass section - like 200Ah or 2 x 100Ah ..... well the sizes really depend on long you wanna play. Avoid using lots of small batteries - it'll just cause hassles. Re bass cabs - well if your 18 is 4R, just try each permutation and use what you prefer - won't affect amp/battery choice. |
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REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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Ganon
Registered User Joined: 07 May 2014 Location: Denmark Status: Offline Points: 114 |
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You looked at the wrong bass face, it's the 1.2 and not the 2.1.
1.2 is digital :D |
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Hi
thanks everybody, I have been studying a bit... Amps: I can find the pioneer for about 180 Euro and the bass face 2.1 for 70 but it strikes me as odd to put ab power on bass- that needs more watts- and put most of the money on the high class d amp, that would need less power and just a simple hi pass. Wouldn't it be more efficient to put more money on a class d monoblock and use a bridged 4 channel ab amp on mid top-if funds will not allow two class d amps? I always run my subs a lot hotter than mid tops with reggae (not just to balance different sensitivities, just 10db more bass) I didn't mean to use subs and kicks, I was wondering wether using one of my 4ohm th18 or two 8ohm cubokicks paralleled to 4 ohm. The second option should be around 8db more sensitive but with higher cut off, so good for max spl/watt. Size and weight about the same. I have found 10 new fiam SLA 7ah 12v for 70 euros, dating max 6 months. Should give 55ah, and be scalable.... what do you think? |
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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^ This. Use the Pioneer as 2 x bridged channels, each with an 8R wedge as midtops. Enable the HPF at 110Hz. Use the bassface with 2 x cubos for bass = 4R load. Enable the 50Hz "subsonic" filter, and set the LPF at highest freq = 108Hz. Forget separate sub and kick. Unless you have big bucks to spend, just get 2 x deep-cycle lead-acid batteries 100Ah or so each. You are then at about the sensible limit for using battery power .... if you want higher power/more complex system than this - use a generator instead. |
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REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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Ganon
Registered User Joined: 07 May 2014 Location: Denmark Status: Offline Points: 114 |
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There are many people using the Pioneer GM-D8604 because it's cheap and perform well.
And some use Bassface db 1.2 for bass, as it gives loads of power, is cheap and has both hpf and lpf :) |
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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Hi, lots of questions; I can help with a few things.
Battery: Car batteries not so good, never run below 50%. Leisure (deep cycle) batteries look the same, but are much better for running amplifiers and can give all their charge without dying. Electric bicycle/laptop/lithium-ion batteries are best of all, but can be very expensive and are more complicated to get 12v. Good amps can handle a 16.8v (4x 3.7v) lithium-ion supply. Amplifiers: Alpine make good amplifiers, but they do make several ranges of decreasing quality. The top tier PDX class D SMPS range are as good a class D amplifier as you'll find anywhere, but cost accordingly. They use less power due to their efficient design and SMPS, so you can last longer, go louder or use fewer batteries; in the context of system design, it can be cheaper to buy a more expensive amplifier... Also, the inbuilt crossovers are acceptable, usually a sweepable low/highpass between 50-400hz and a low cut switch (35 or 40hz?). Always look to use separate amplifiers for different speakers. If you're lucky, you can build a 2 or 3 way system just using internal crossovers. Eventually you might move to an external crossover (Kenwood made some wicked ones that still command much respect and money). |
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