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Questions tagged [impedance]

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43 votes
7 answers
170k views

What is the effect of impedance on headphone sound quality?

Headphones come in various different impedance levels, such as 8, 16 and 32 Ohms. The power supplied by the audio source can be at different levels due to a variety of factors such as being limited ...
Cory Klein's user avatar
38 votes
6 answers
193k views

Difference between microphone and line in inputs?

Just something I've always wondered—most sound cards have both a line in and a microphone, and I've never been able to tell the difference between anything recorded with them. Lately I've seen cards ...
user avatar
12 votes
2 answers
4k views

What is impedance and why do I care when buying a microphone?

I've been researching some mics and aside from reviews I've been looking at the specs. I'm not sure I understand what impedance is and why I care about it when purchasing a mic.
user avatar
10 votes
2 answers
95 views

What does an active DI box offer that a passive doesn't?

I heard that an active DI box doesn't amplify the signal at all in anyway so what is the benefit over a passive unit and is it always preferable?
user avatar
7 votes
2 answers
15k views

6 ohm speakers and 8 ohm receiver

I have a Sony Receiver STR-710 and by specification it's 8 ohm only and output power 6 x 100 Watts . I'm wondering should I buy two pairs of Yamaha NS-777 speakers which are 6 ohm 100/250 Watts. Will ...
Teneff's user avatar
  • 171
6 votes
2 answers
950 views

How do I match a microphone to a preamp

How can I tell if a microphone with work with a given preamp? Some preamps don't have the power for dynamic or ribbon mics. How can I tell if a certain mic is extra needy in the gain department? ...
Sam Greene's user avatar
6 votes
2 answers
477 views

Does headphone impedance make any difference except for volume? [duplicate]

Possible Duplicate: What is the effect of impedance on headphone sound quality? Does headphone impedance make any difference except for volume?
user avatar
5 votes
4 answers
21k views

High impedance headphone for MacBook without an amp?

I planned to compose song with my Macbook Pro and I like Beyerdynamic so I choose DT 990 as I wanted to try open back headphone. The problem is which impedance to choose? I don't plan to buy an amp, ...
5argon's user avatar
  • 318
5 votes
1 answer
787 views

Audio Interface > Guitar Pedal Chain > Audio Interface

I have a bunch of guitar pedals (stompboxes) that are sitting idle. I'd like to run a mono track of music from my computer through these pedals and record it back into the computer again. The audio ...
user avatar
5 votes
1 answer
909 views

General (studio) headphones question; impedance, tonality, mixing

I picked up a pair of beyerdynamic DT 770 PRO (250 ohm) headphones a couple of days ago. My reasoning being I don't have a decent pair (I borrow a cheaper pair occasionally, AKG K77s), and my room has ...
user avatar
4 votes
1 answer
99 views

Impedance for amp and speaker combo

I have a set of speakers rated at 6ohms impedance and handle 75W, but my amp says 8 ohms or more. Does this mean I need to buy a 2ohm resistor for each speaker? Or just not turn it up loud? Or play it ...
Nathan Edwards's user avatar
3 votes
1 answer
3k views

Will audio interfaces power most or all headphones?

I want to buy a pair of headphones with these stats: Sound pressure level (SPL) 97 dB (SPL) at 1 mW, 300 ohms And I have this audio interface but I can't tell by the specs if it can power these ...
Glorious Kale's user avatar
3 votes
1 answer
1k views

Mic level or line level for long runs?

When running sound for a group with keyboards and other devices that have balanced outs, I will often run them through the same snake and attach them to the line level input on my mixer. I don't ...
Brad's user avatar
  • 2,588
3 votes
3 answers
16k views

Headphones: high versus low impedance?

So I have a Sennheiser HD 280 PRO headphones. These headphones have an impedance of 64 ohms. They sound great. http://en-us.sennheiser.com/professional-dj-headphones-noise-cancelling-hd-280-pro I ...
Jason Axelrod's user avatar
3 votes
1 answer
192 views

Estimate a mic's impedance?

Hi all, lately I discovered an old pickup mic in my attic whose impedance I don't know... is there a cheap and easy way to estimate it? I'm aware that a precise measurement would require an ...
Julian's user avatar
  • 307
3 votes
1 answer
93 views

Audio Interface + Microphone: Load Impedance / ratio

I want to buy an Audio Interface and Condenser Microphone to record to my PC. I found the two following matching my needs: SSL 12 (Overview) Austrian Audio OC818 (Overview) But according to several ...
MadRainbow's user avatar
3 votes
1 answer
2k views

Recording a headphone output using USB sound card microphone input

So the setup that I have is that I have a device that traditionally outputs sound from a speaker but also includes a single headphone output via 1/4" jack that, when plugged in, turns off the speaker. ...
Dennis's user avatar
  • 31
3 votes
1 answer
124 views

Amplifier Power Ratings

I want to understand the rating of my Marantz PM6002 amp. The backplate says: System 1: 4 - 16 Ohms System 2: 4 - 16 Ohms 1 + 2 : 8 - 16 Ohms So looking at the backplate, am I within the stated ...
MJM's user avatar
  • 133
2 votes
1 answer
792 views

What happens when the output impedance of a headphone amp is higher than the input impedance of the headphones?

I'm trying to wrap my head around input- and output impedances. From this question I learned that the output impedance of a headphone amplifier should be lower than the input impedance of the ...
Jaap Joris Vens's user avatar
2 votes
1 answer
378 views

Combining multiple Speakers Impedance - what is the preffered way?

I'm building a custom sound system using the HiFi Berry Amp2 which claims to [...] "work with all speakers or 4-8 Ohm impedance. It supports sample rates from 44.1-192kHz (16-32bit)." According to ...
Fabs's user avatar
  • 23
2 votes
1 answer
6k views

Can I connect a bass guitar directly to my mixer?

Is it possible to play a bass guitar through one of the stereo channels (L/mono) for example, on Behringer ZENYX 1823 sound mixer?
Mr. Jacobus H. Slabber's user avatar
2 votes
1 answer
666 views

Wiring an 120W amp head to the box (stereo)

I have a 120W amp head which has two outputs in the back and a switch for 16/8/4 Ω. In the instructions there is a table which is not perfectly clear to me. Does "1x 16Ω" mean one speaker of 16Ω or ...
71GA's user avatar
  • 121
2 votes
1 answer
2k views

How can I test a speaker circuit's impedance?

How can I test a speaker circuit's impedance? I am working on a circuit that has 2 ceiling speakers and 1 book shelf type speaker. I only have a single pair coming back to the amplifier. I am ...
Corey's user avatar
  • 916
2 votes
2 answers
106 views

Headphones impedance and the SPL

The headphones A has an impedance of 32 Ohms. The headphones B has an impedance of 250 Ohms. Both of the headphones are similar by size. Is it right that the headphones B will play quieter by 250/...
user avatar
2 votes
2 answers
7k views

Can I connect DI box to mixer line in?

I am presently feeding my DI boxes through a multicore and into my mixers XLR mic inputs. However I wonder if I could feed them into the line inputs (1/4" jack) instead. I would obviously need to ...
B.R.Heath's user avatar
1 vote
6 answers
2k views

Low impedance monitoring headphones that work with Mbox Mini

I recently discovered that I can't use just any headphones with my Mbox Mini as it seems to have a somewhat underpowered headphone amplifier. I did this by buying a pair AKG K240 mkII headphones (...
Mr Shoubs's user avatar
1 vote
2 answers
230 views

What is the difference of having one speaker per output vs many speakers on one output

Let's say there is an amplifier with two outputs, expecting 4 ohm impedance. One will wire two speakers one on each output with the corresponding impedance (4ohm). Everything is correct here. But ...
Cătălina Sîrbu's user avatar
1 vote
2 answers
197 views

Guitar pedals + sound card: What's wrong with the combination?

When I asked a question here where I also described my setup, there were two comments that suggested that there was something wrong with my setup. Which is like this: Eventide Space (reverb) and BOSS ...
Cybsilon-π's user avatar
1 vote
1 answer
52 views

Damping factor formula

I thought I understand damping factor, but apparently I was wrong. http://en.wikipedia.org/wiki/Damping_factor The article on wikipedia makes sense, but it doesn't explain why higher impedance of ...
user107986's user avatar
1 vote
0 answers
91 views

Can you reduce noise by decreasing input impedance with a resistive load?

A general question but inspired by a specific example so framed as such. I have powered studio monitors attached to a computer's unbalanced headphone port, and there is some amount of underlying ...
Jazz Weisman's user avatar
0 votes
3 answers
743 views

What are the audible consequences of preamp impedance mismatch?

When working with outboard effects, microphones, preamps etc. the impedance may vary and some combinations may have a bad influence on the signal/operation of the equipment. Consider the following ...
Michael Hansen Buur's user avatar
0 votes
1 answer
885 views

USB sound card not detecting Shure mic

I'm still not sure whether this is the right forum to ask this question. However, I must ask this somewhere. I recently bought a cheap USB sound card [1], which seems to be using the chip CM108. It ...
Nandakumar Edamana's user avatar
0 votes
1 answer
1k views

Xperia Neo V compatible earphones

I wanted to know if Sony XBA-3 earphones are compatible with Xperia Neo V phone? Also, how to find out the output impedance on the phone's headphone jack? Will there be any need of amplifier? If yes, ...
ivorykoder's user avatar
0 votes
1 answer
54 views

Combining speaker drivers due to damaged component

I would appreciate some loudspeaker expertise. Knocked over a speaker, magnet broke off of the tweeter. Now I'm stuck in a DIY situation with the following components: One set of 2-system custom ...
Ate Somebits's user avatar
0 votes
1 answer
409 views

Headphone Impedance Issue, L/R channels cancel each other out [closed]

I have a pair of Sennheiser PC360 headphones that I use with an amp to listen to music, movies, etc daily. My 50lb pitbull loves to get his legs caught in the cable and yank the headphones off my head....
Andrew's user avatar
  • 88
0 votes
1 answer
88 views

Building adapter to connect dynamic handheld mic to 3.5mm TRS Lav mic input

I want to use a pair of Rode Wireless GO IIs as transmitters for a pair of switched dynamic wireless mics (both low end SM58S clones without transformers Behringer SL85S) I want to use them for live ...
Robb Godshaw's user avatar
-1 votes
1 answer
78 views

Troubleshooting clipping

I am collecting data for a project, where I am measuring the room impulse response by playing a sine sweep from a speaker (QSC K8 1KW Active Loudspeaker) and measuring it from the other side of the ...
Mason Wang's user avatar