The E300 Ulta VCO is based on the 5U MOTM-300 VCO with modern improvements and added features.
Introduced in 2000, the MOTM-300 was based on a sawtooth core designed by Dave Rossum and used in the EMu modular. Since that design was already 25years old, we improved the performance by using 0.1% 25PPM resistors, newer op amps with low temerature drift, and other things. But technology marches on, and now in 2019 we decided to get back together and re-design the sawtooth core to take advantage of today's improved silicon and passive components.
The E300 still uses precision, low drift resistors, adding improved C0G ceramic timing caps, the latest in low drift and low THD OPA op amps, and a new, unique triangle waveshaper that generates 'glitchless' triangles and sine waves.
The MOTM-300 was very sensitive to the rise time of external VCOs used to sync, and the E300 uses a much improved sync/triggering scheme to allow any signal, with fast or slow edges, to reliably force sync.
We decided that a more useful feature not in the MOTM-300 was a switchable -1/-2 suboctave (square wave) on a dedicated output jack.
Height 3U (128.5mm)
Width 14hp (70.8mm)
Depth (with power cable attached) 30mm
Power 16-pin Eurorack (53mA from +12V, 28mA from -12V)
CV input range 10Vpp (-5V to +5V), DC to 10KHz
SYNC Input 50K nominal input impedance, trip point is +1.1V
Audio Output 10Vpp (-5V to +5V), 14Hz to 15.5KHz frequency range (panel controls). Overal range is 0.5Hz to 40KHz
Linear FM AC coupled, sensitivity is 50Hz/V
Warm-up Time The circuitry needs to be powered for 30min to achieve the published tracking and drift performance
Temperature Drift (24hrs) @ 440Hz 0.15Hz, maximum, ambient temperature 15C to 35C (59F to 95F)
Tracking (assuming ideal 1V/Oct input) 0.25Hz maximum, 25Hz to 3200Hz, +-3 cents 3200Hx - 10KHz
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
Product Overview
The E300 Ulta VCO is based on the 5U MOTM-300 VCO with modern improvements and added features.
Introduced in 2000, the MOTM-300 was based on a sawtooth core designed by Dave Rossum and used in the EMu modular. Since that design was already 25years old, we improved the performance by using 0.1% 25PPM resistors, newer op amps with low temerature drift, and other things. But technology marches on, and now in 2019 we decided to get back together and re-design the sawtooth core to take advantage of today's improved silicon and passive components.
The E300 still uses precision, low drift resistors, adding improved C0G ceramic timing caps, the latest in low drift and low THD OPA op amps, and a new, unique triangle waveshaper that generates 'glitchless' triangles and sine waves.
The MOTM-300 was very sensitive to the rise time of external VCOs used to sync, and the E300 uses a much improved sync/triggering scheme to allow any signal, with fast or slow edges, to reliably force sync.
We decided that a more useful feature not in the MOTM-300 was a switchable -1/-2 suboctave (square wave) on a dedicated output jack.
Height 3U (128.5mm)
Width 14hp (70.8mm)
Depth (with power cable attached) 30mm
Power 16-pin Eurorack (53mA from +12V, 28mA from -12V)
CV input range 10Vpp (-5V to +5V), DC to 10KHz
SYNC Input 50K nominal input impedance, trip point is +1.1V
Audio Output 10Vpp (-5V to +5V), 14Hz to 15.5KHz frequency range (panel controls). Overal range is 0.5Hz to 40KHz
Linear FM AC coupled, sensitivity is 50Hz/V
Warm-up Time The circuitry needs to be powered for 30min to achieve the published tracking and drift performance
Temperature Drift (24hrs) @ 440Hz 0.15Hz, maximum, ambient temperature 15C to 35C (59F to 95F)
Tracking (assuming ideal 1V/Oct input) 0.25Hz maximum, 25Hz to 3200Hz, +-3 cents 3200Hx - 10KHz
Technical Specs
Shipping Details
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
