Discerning audio engineers and producers on a budget should consider the PreSonus Eris Studio 4, a nearfield monitor designed to sound good in any location. Tune the monitor to your specific environment with a bevy of convenient acoustical features. The monitor offers an exceedingly wide sweet spot, thanks to the Elliptical Boundary Modeled (EBM) waveguide, which ensures a wide and controlled dispersion. A 50W Class-AB amplifier powers the 4.5" composite woofer and a 1" silk-dome tweeter, which combine for a full-range sound with plenty of volume.

4.5" Woofer and 1" Silk-Dome Tweeter    55 Hz to 20 kHz Frequency Response    100 dB SPL    EBM Waveguide for a Wide Sweet Spot    Control Level, HPF, MF Trim, and HF Trim    Acoustic Space Filter    XLR, 1/4" TRS, and RCA Connections    Class-AB Bi-Amplification at 50W    RFI Protection    Output Current Limiting

• 4.5" woven-composite, low-frequency transducer
• 1" ultralow-mass, silk-dome, high-frequency transducer
• 100°(H) x 60°(V) EBM waveguide for wide sweet spot
• Front-firing acoustic port for superior bass-frequency reproduction and optimized, resonance-suppressing internal bracing
• 50W, Class AB bi-amplification
• 55 Hz to 20 kHz frequency response
• 100 dB SPL (peak, at 1 m)
• Acoustic Tuning controls: HF (±6 dB, continuously variable); Midrange (±6 dB, continuously variable), and Acoustic Space (flat, -2, -4 dB), plus high-pass filter (Off, 80 Hz, 100 Hz)
• RF interference, output-current limiting, over-temperature, transient, subsonic protection and amplifier “soft start” feature (eliminates popping on power-up)
• Internal power supply with IEC connector and power switch with on/off LED
• Balanced XLR and 1/4" inputs and unbalanced RCA inputs

Related Questions and Answers

Q: 1. Do they come two to a package, or do I need to order two of them.?

A: This particular item ships as a single unit. We do also offer these as a set of two. See B&H# AUIPSPK

Q: 2. If input B was fed with a signal to the 1/4" inputs, could I use the 1/8" jack as an output to a video recorder? Is is parallel?

A: No, the 3.5mm (1/8") jack on the Mackie Big Knob Passive Studio Monitor Controller overrides the 1/4" inputs on channel B.

Q: 3. Does it allow you to play both monitors at the same time?

A: No, the Mackie Big Knob Passive Studio Monitor Controller allows you to choose between two audio sources and two monitor pairs. This means that you can connect the monitor controller to two different pairs of monitors and choose which pair that you want to hear. You can only listen to one pair at a time, but not both pairs at the same time.

Q: 4. Does the headphone output have enough power to drive Sennheiser HD600 headphones which are I believe 300 ohms?

A: Absolutely. The headphone amps in these products are the same as are in our mixers, dedicated headphone amps and other interface products, which support the entire range of common headphone impedances, and have been trusted for use with pro headphones (read: high impedance) for nearly 30 years.

Q: 5. Wanting to add a shotgun boom to this stand. What accessories do I need to purchase? Thanks!

A: Yes. Please review the following item in order to do so. Auray Boom Pole Holder BH #AUBPH • MFR #BPH https://bhpho.to/3lYLmKe

Q: 6. Can one adjust the height of these stands? I need 40" height.

A: These stands are not adjustable and are fixed at 36". We do carry monitor stands that are adjustable to 40". Please follow the link below to see what we currently have in-stock: https://www.bhphotovideo.com/c/search?ci=29880&fct=fct_height_5606%7c26-52in%2bfct_height_5606%7c30-42in%2bfct_height_5606%7c30-50in%2bfct_height_5606%7c31-45in%2bfct_height_5606%7c31-53in%2bfct_height_5606%7c32-44in%2bfct_height_5606%7c32-45in%2bfct_height_5606%7c35-58.5in%2bfct_height_5606%7c36-54in%2bfct_height_5606%7c36.5-54in%2bfct_height_5606%7c37-56in%2bfct_height_5606%7c40in%2bfct_a_filter_by%7c03_INSTOCK&N=3706458034&

Q: 7. Can this be used as a backdrop stand and is there a suitable crossbar that could go with this that is also made of durable material so that there is no bowing in the middle when the stand is fully extended and holding weight ten feet across?

A: I use these for background stands, but I attached a Superclamp to the baby pin at the top and then use a piece of 10 foot conduit, that is clamped into the Superclamp, I picked up the electrical conduit from Home Depot or Lowes in their electrical departments.The electrical conduit is NOT collapsible but is it available in various sizes for backgrounds with pockets and they typically will not bow unless you hang a LOT of weight from them.

Q: 8. Have Mackie HR824s, what type of plugs are on the Big knob passive?

A: Yes, as already has been answered, it uses 1/4 inputs and one 1/8 input that replaces 1/4 input on input B. And as mentioned, no software, no power. Just plug and play!

Q: 9. What is the thickness of the thicker portion of the platform ?

A: With my JBL LSR308 Studio monitor sitting on these, the rear thickness still stands about 2 1/4 inches.

Q: 10. What adapter I need to put a Godox SD100d Bi light on this ? thanks

A: The Godox SL100D Daylight LED Video Light has a standard 5/8 receiver on the bracket and the Impact Turtle Base C-Stand - 10.75' (Chrome) top is a 5/8 male stud. It will fit with out any adapter.